Can you find out the missing number in the grid?

Count the number of triangles in the picture below:

A man is found dead with a knife in his back When the investigation is done. A chair lays beside him and the forensic team finds moisture around the body.

If he committed suicide, how did he do it?

A man is lying dead in a field where no one is around. His head is split open and his legs are disfigured. Near to him, there is an unopened package. No living organism can be found anywhere at the crime scene.

How did he die?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

What can you see in the middle of March and April that you can never see in any other month?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

There is something which you can be arrested for attempting but not for successfully completing.

In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?